It's quite weird seeing the priest suddenly starting to speak English in the pages 15, 16 and 17 too (use of romaji in the first panel): if you can learn foreign languages that way, I want to sign up for the course immediately... :D
@suratkabar; According to machine translating the synopsis, it's sex disease. There a condition in the setting where some men suffer from an incurable disease where if it flares up they need to have sex with a woman within 30 mins or they'll die. That's what the eyes turning red means. Seems like the woman is expected to endure it to prevent the man's death.